Overview

The Hertzsprung-Russell
diagram (HRD) is a classic tool of astronomers used to
investigate how stars evolve. My figure above shows the
evolution in the HRD of models of high mass Population
III stars. These are the first stars formed after the Big
Bang and contain virtually no heavy elements. They are believed
to be responsible for re-ionization
of the Universe after the Dark
Ages. Population III stars have not yet been observed but
their detection is a goal of the James
Webb Space Telescope.

My office is Room 270
in Sharp
Lab. The best way to contact me is by e-mail to
jimmacd@udel.edu. You can try to phone me at 302-831-6855 or
write to me at 104 The Green, Newark DE 19716.

Research

I am an astrophysicist who is primarily interested in computer
modelling of stars. Recent research has focused on how a star's
magnetic field influences its structure and evolution.